Returning Offers From Item Variations

The Book, Music, Video, and DVD search indices have very few parent items. The Apparel,
Jewelry, and SportingGoods search indices have many parent items and variations.

If a parent item is returned in a response, it will not have an offer. Instead, you
must find the offers associated with the variations
of the parent item. You do this by adding the Variations response group
to the request, as follows.